26493281 has 4 divisors (see below), whose sum is σ = 26520852. Its totient is φ = 26465712.

The previous prime is 26493241. The next prime is 26493283. The reversal of 26493281 is 18239462.

26493281 is nontrivially palindromic in base 8.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18239462 = 2 ⋅9119731.

It can be written as a sum of positive squares in 2 ways, for example, as 25411681 + 1081600 = 5041^2 + 1040^2 .

It is a cyclic number.

It is not a de Polignac number, because 26493281 - 2¹⁸ = 26231137 is a prime.

It is a super-2 number, since 2×26493281² = 1403787876289922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26493283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12290 + ... + 14283.

It is an arithmetic number, because the mean of its divisors is an integer number (6630213).

Almost surely, 2^26493281 is an apocalyptic number.

It is an amenable number.

26493281 is a deficient number, since it is larger than the sum of its proper divisors (27571).

26493281 is an equidigital number, since it uses as much as digits as its factorization.

26493281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27570.

The product of its digits is 20736, while the sum is 35.

The square root of 26493281 is about 5147.1624221507. The cubic root of 26493281 is about 298.1113985271. Note that the first 3 decimals are identical.

The spelling of 26493281 in words is "twenty-six million, four hundred ninety-three thousand, two hundred eighty-one".